Documentation available variables

Original developer documentation:
https://github.com/wako-unofficial-addons/helios?tab=readme-ov-file#provider-interface-documentation

Syncler v1 Helios integration:
https://web.archive.org/web/20201009000524id_/https://www.reddit.com/r/SynclerApp/comments/j4zkcr/syncler_update_helios_provider_support_new_website